CMMG 55AFC5B 30-Round 5.56/.223 AR-15 Magazine Black Polymer

The CMMG 55AFC5B delivers reliable 30-round capacity for AR-15 and MK4 platforms in 5.56/.223 calibers. This black polymer magazine combines proven feeding geometry with durable construction for consistent performance across training and tactical applications.

What Makes This Different

CMMG's magazine design incorporates anti-tilt followers and optimized spring tension to prevent double-feeds and misfeeds that plague standard magazines. The polymer body reduces weight by 40% compared to steel alternatives while maintaining structural integrity under repeated loading cycles. Internal geometry follows military specifications for reliable feeding with both 5.56 NATO and .223 Remington ammunition.

Key Features

• 30-round capacity with anti-tilt follower system
• Lightweight polymer construction reduces carry weight
• Compatible with AR-15, M4, and CMMG MK4 platforms
• Textured grip surfaces for positive handling
• Stainless steel spring rated for 10,000+ compression cycles
• Removable floorplate for cleaning and maintenance
• Accepts both 5.56 NATO and .223 Remington cartridges

Field testing demonstrates consistent feeding through 500+ round sessions without cleaning or lubrication. The magazine functions reliably in temperatures from -20°F to 140°F, making it suitable for competition shooting, law enforcement duty, and recreational use. The polymer body resists impact damage and chemical exposure better than aluminum alternatives.

Technical Specs

• Capacity: 30 rounds
• Caliber: 5.56x45mm NATO, .223 Remington
• Body Material: High-impact polymer
• Spring: Stainless steel
• Follower: Anti-tilt polymer design
• Overall Length: 7.1 inches
• Weight: 4.2 ounces empty
• Compatibility: AR-15, M4, CMMG MK4 platforms
• Finish: Matte black
• Country of Origin: USA

CMMG's reputation for precision manufacturing extends to their magazine line, ensuring dimensional consistency and reliable lockup. The 55AFC5B represents proven technology at a competitive price point for shooters demanding dependable performance.